Ziehl-Abegg RH71C Alternative — LONGWELL LWBE3G630
Looking for an alternative for Ziehl-Abegg RH71C-6DK? The LONGWELL LWBE3G630 is the nearest listed size (Ø630 mm); a Ø710 mm drop-in is not in the current catalogue — same control protocol, performance characterized using AMCA 210/211 test methods (test report on request) — at 40–55% lower landed cost with 15–30 day delivery vs 14–18 weeks ex-works Ziehl-Abegg. Widely deployed across very large CRAH, industrial process exhaust, stadium HVAC.
Specification Comparison
| Specification | Ziehl-Abegg RH71C | LONGWELL LWBE3G630 |
|---|---|---|
| Fan type | EC backward-curved centrifugal plug fan | EC backward-curved centrifugal plug fan |
| Impeller diameter | Ø710 mm | No listed Ø710 mm model — nearest listed size Ø630 mm (LWBE3G630, 7 models) |
| Airflow range | 2,200–16,000 m³/h | up to 21,742 m³/h per Ø630 unit — larger duties as FanGrid arrays |
| Static pressure (max) | 1700 Pa | up to 1,677 Pa (Ø630 unit) |
| Motor power (max) | 7,500 W | up to 5,600 W per unit |
| Noise floor (Lw) | 43 dB(A) | from 66 dB(A) (nameplate, per model) |
| Voltage | 380–480 V 3Φ | 380–400 V 3Φ |
| Control input | 0–10 V / PWM / Modbus / EC-Control | 0–10 V / PWM / Modbus RTU (RS485) |
| IP rating | IP54 / IP55 | IP54 std · IP55 / IP67 option |
| Certifications | CE · UL · VDE · EAC | CE · RoHS · REACH · ETL on request |
| Sample lead time | 4–10 weeks | 1–3 days |
| Series lead time (≤500 units) | 14–18 weeks | 15–30 days |
| Landed cost index (LONGWELL = 100) | 175–200 | 100 (baseline) |
Why Engineers Switch from RH71C to LWBE3G630
4–8× Faster Delivery
40–55% Lower Landed Cost
Nearest size + FanGrid option
Drop-in compatibility: what matches and what to confirm
Mechanical match
LONGWELL does not currently list a Ø710 mm unit in this family. The nearest listed size is Ø630 mm (LWBE3G630); for the airflow of a single Ø710 mm fan, engineering proposes 2–4 smaller EC units in a FanGrid array or a custom development — mounting is not a drop-in.
Electrical & control match
The LWBE3G630 accepts the same 0–10 V analog speed reference, PWM (1 kHz), and Modbus RTU (RS485) control signals as Ziehl-Abegg RH71C. LONGWELL supplies its Modbus RTU register map with the fan so the BMS points can be re-mapped; the register addresses are not identical to the Ziehl-Abegg map.For ebm-papst-specific bus protocols (EC-Control), ask LONGWELL engineering for the integration options.
Performance match
The measured P-Q curve of every LONGWELL model is on its model page; we check your duty point against it before quoting.
Typical Applications
The LWBE3G630 is widely deployed across very large CRAH, industrial process exhaust, stadium HVAC. Common application categories include:
- Large CRAH
- Process exhaust
- Large RTU
Particularly suited for very large CRAH and industrial process exhaust applications.
FAQ
Is LONGWELL LWBE3G630 a true drop-in replacement for Ziehl-Abegg RH71C?
How does LWBE3G630 compare on efficiency to RH71C?
What’s the 2026 lead time difference?
What’s the cost delta?
What applications is LWBE3G630 typically used for?
Replace your RH71C — samples in 1–3 days
Send a quick request — model + quantity + delivery address. Sample unit ships in 1–3 days for field validation. Series production at 15–30 day lead time after PO.
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